Robtex

Up: 208.76.61.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 208.76.61.0/26
Down right: 208.76.61.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
208.76.61.1	A+PTR	ns3.dyndns.org
208.76.61.2	A+PTR	ns3.mydyndns.org
208.76.61.2	A	ns2.okada.net
208.76.61.3	A+PTR	ns1.dyndns.org
208.76.61.3	A	ns.dyndns.org
208.76.61.4	A	sauba.pt
208.76.61.5	A+PTR	ns4.myiomega.net
208.76.61.100	A+PTR	ns1.everydns.com
208.76.61.100	A	ns2.cinquer.nl
208.76.61.100	A	everydns1.insighthk.com